Struct InitializeRequestParams 

pub struct InitializeRequestParams {
    pub capabilities: ClientCapabilities,
    pub client_info: Implementation,
    pub meta: Option<InitializeMeta>,
    pub protocol_version: String,
}

Parameters for an initialize request.

JSON schema

{
 "description": "Parameters for an initialize request.",
 "type": "object",
 "required": [
   "capabilities",
   "clientInfo",
   "protocolVersion"
 ],
 "properties": {
   "_meta": {
     "description": "See [General fields: _meta](https://modelcontextprotocol.io/specification/2025-11-25/basic/index#meta) for notes on _meta usage.",
     "type": "object",
     "properties": {
       "progressToken": {
         "description": "If specified, the caller is requesting out-of-band progress notifications for this request (as represented by notifications/progress). The value of this parameter is an opaque token that will be attached to any subsequent notifications. The receiver is not obligated to provide these notifications.",
         "$ref": "#/$defs/ProgressToken"
       }
     },
     "additionalProperties": {}
   },
   "capabilities": {
     "$ref": "#/$defs/ClientCapabilities"
   },
   "clientInfo": {
     "$ref": "#/$defs/Implementation"
   },
   "protocolVersion": {
     "description": "The latest version of the Model Context Protocol that the client supports. The client MAY decide to support older versions as well.",
     "type": "string"
   }
 }
}

Fields

capabilities: ClientCapabilities

client_info: Implementation

meta: Option<InitializeMeta>

protocol_version: String

The latest version of the Model Context Protocol that the client supports. The client MAY decide to support older versions as well.

Trait Implementations

impl Clone for InitializeRequestParams

fn clone(&self) -> InitializeRequestParams

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for InitializeRequestParams

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for InitializeRequestParams

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for InitializeRequestParams

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.